I will be using Godot also and my plan is to do a 3d game since my friend is mainly a 3d artist. It is the first time I am doing 3d, just toying till now, but Godot seems friendly enough so I hope I will be able to make a simple game. Good luck to all!
Viewing post in Curious: Anyone planning to use Godot Engine?
If they decide to use Blender to create the 3D art, you might look into Godot's escn format. Last I recall, someone had built tools in the Editor for somehow having Blender export a scene as a specialized format that could be directly opened in Godot (an exported scene, i.e. *.escn format). More info can be found here and there is plenty of other documentation for importing 3D assets in the official docs.
Have fun!